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    • 33. 发明授权
    • Ultrashort optical pulse signals generation
    • 超短脉冲信号产生
    • US5265109A
    • 1993-11-23
    • US965473
    • 1992-10-23
    • Wayne H. Knox
    • Wayne H. Knox
    • H01S3/094H01S3/098H01S3/139H01S3/23H01S5/068
    • H01S3/094026H01S3/0805H01S3/0811H01S3/094034H01S3/094038H01S3/1112H01S3/1115H01S3/1392H01S3/2383
    • Apparatus is disclosed for generating two streams of optical pulse signals having less than 100 femtoseconds of jitter. A Ti:sapphire laser that is self mode locked by using self focusing in the gain medium and a weak HITCI intercavity dye jet for starting generates a first stream of substantially 100 femtosecond pulses. This first stream of optical pulses is split into two parts, one of which is used as a desired stream of optical pulses and the other of which is used to pump an HITCI dye laser synchronously to generate a second desired stream of optical pulses. The pulses of the second stream from the dye laser have durations of about 140 femtoseconds and less than 100 femtoseconds of jitter relative to the pulses of the first stream. Stated differently, if pulses of about 100 femtoseconds duration are used to pump a gain medium which exhibits strong gain saturation, then the pulses which are generated will have less than 100 femtoseconds of jitter relative to the pump pulses provided that the generated pulses have durations which are greater than the pump pulses. In the embodiment disclosed, the laser which is pumped with the first stream of pulses is a HITCI dye laser having a small positive dispersion in its cavity to ensure that the pulses generated by the dye laser pulses remain slightly larger than the pump pulses.
    • 公开了用于产生具有小于100飞秒的抖动的两个光脉冲信号流的装置。 通过在增益介质中使用自聚焦的自锁模式的Ti:蓝宝石激光器和用于启动的弱HITCI间隙染料喷嘴产生基本上100飞秒脉冲的第一流。 该第一光脉冲流被分成两部分,其中之一被用作期望的光脉冲流,另一部分用于同步泵浦HITCI染料激光以产生第二期望的光脉冲流。 来自染料激光器的第二流的脉冲相对于第一流的脉冲具有约140飞秒和小于100飞秒的持续时间。 换句话说,如果使用大约100飞秒持续时间的脉冲泵送表现出强增益饱和度的增益介质,则所产生的脉冲相对于泵脉冲将具有小于100飞秒的抖动,只要所产生的脉冲具有持续时间, 大于泵浦脉冲。 在所公开的实施例中,用第一脉冲流泵浦的激光器是其空腔中具有小的正色散的HITCI染料激光器,以确保由染料激光脉冲产生的脉冲保持略大于泵浦脉冲。